Motion-picture apparatus.



C. F. JENKINS. Manon PICTURE APPARATUS. APPLICATION men 0ct.n.1s1si l 1,302,801; I Patented May 6, 1919 2 SHEETSr-SNEET l.

c Q I; i s 3 fi l I l f a I A Witnaoo if C. F. JENKINS. MOTION PICTURE APPARATUS.

APPLICATKON FILED OCT. ll.\l9l6.

1,302,801, latenfed May 6, 1919 2 SHEETSSHEEI 2.

V IIIIIIIIIIIIII 1! "UNITED STATES PATENT OFFICE.

CHARLES FRANCIS JENKINS OF WASHINGTON, DISTRICT OF COLUMBIA, ASBIGhl'OB TO THE GRAPKOSCOPE COMPANY, OF WASHINGTON, DISTQICIOIKCOLUKBIA, 1 CO3- POBATIOK OF DELAWARE,

To all whom. it may concern:

Beit known that I, Cunnmcs FRANCIS JEN- KINS, a citizen of the United States, and

residcntof 'ushington, in the District of (.ollunbia, have invented certain new and useful Improvements in Motion-Picture Apparatus, of which the following is a specification, referencibeing had therein to the accompanying drawing; a

The oh ei-tof this invention is to provide improvedantoniatic means whereby in'cprojecting'maehim-s the shutter between the lens and thcfilm will open when th. machine is started and brought up to normal speed and will close when the speed falls.

In the accompanying drawings, Figun- 1 is a side elevation of a portion of a projecting machine.

Fig. 2 iso view looking from the right in Fig. 1.

Fig. 3 is a-section on the line 33, Fig. l. Fig. 4 shows the parts seen -in Fig. 3 in a different position.

Fig. 5 is a section on the line 5-5, Fig. 3. Fig. 6 is a perspective view of a member shown in Figs. 3, 1i, 5.

. in these figures, 1 represents the casing of projecting machine, 2 a shaft projecting outside the frame and driven, whenever the machine is working. by a pinion 3. On this shaft ismounted a common centrifugal speed governor-like device 4: protected by a casing 5 and carnving at its sliding end a disk 6 which thus moves outward on the shaft when centrifugal force throws the weights 7 outward as shown in Fig. 4. In this sliding, the disk strikes and swings a lever member 8, having suitable shoulders, which is centrally pivoted at 9 upon 9. lug on the' casing. This lever is connected by a link 10 to a crank 11' upon a short bell-crank shaft 11 extending through the casing at some distance above the shaft 2, and the inner arm 12 of the bellcrank is connected by a rod 13 with an arm 14 fixed to a shutter 15 which is pivoted at its upper edge and, when the machine is at rest, prevents light from passing from the lens to the film at the exposure aperture, the parts first described being then in the positions illustrated in Fig. 3. The shaft 11'is xenon-morons armour.

provided with a heavy handle 16 by which,

incidental] the shutter may be manually swung. T iis handle, when m the position shown in; Fig. 1, tends by its weight to hold the shutter t ghtly closed as it might otheringshaft slides-".andz thev-disk byforcing: the lever to swingopensi-the shuttenthehandlethe lever 8. When Specification of mm Intent. Pat ted May 6, 1919. Application ind m... 11, 1919. serial 1m. meow weight-is swung'to the opposite side of the perpendicularlwhere its weight carries the shoulder 17 of. the: lever 011 of contact with the disk as inFig. 4, and olds it there so long as the-weights? are held in their outer sitions. In other 'w'ords, thedislkis never in contactwith the lever. except momentaril while the shutter is being opened or cl and hence there is no appreciable wear at this int.

31;. Iclaimlisi z 1. In devices of the class described the combination with a shutterand automatic devices for-opening and-closing the same as the operating parts of the apparatus pass from and to a state of rest, of means whereby the shutter is held in either the open or the closed position in which it may while said devices are temporarily enti y free therefrom. 4

' In apparatus of the class described, the combination with a shaft rotated by the o crating force and bearing a centrifugal d vice, of a light-interrupting shutter, and a pivoted lever connected with the shutter, normally out of contact with the centrifugal device at rest or at operating speed,'and arranged to be tilted by said device in passing to or from its position of rest.

.3. In apparatus of the class described, the combination with ashaft rotated b the 3- erating force and bearing a centri ugal vice, of a lightdnten'upting. shutter, a pivoted lever connected with the shutter, normally out of contact with the centrifugal device at rest or at operating speed, and flr'anged. to be tilted by said device inpassing to or from its position of rest, and means resisting .the movement of the lever from either limit to which it may be swung.

4. In up aratnsef the class des cgibed having a she t rotated by the operatlng force, and a light interrupting shutter, a pivoted member connected with the shutter to open and close the same by its swinging, a centrifugal device carried by said shaft and arranged to swing said pivoted member to and fro asits speed rises and falls, and means for holding said member flee from the centrifugal device while his itself holding the 10 shutter open.

In testimony whereof. I hereunto affix m signature. 4

CHARLES FRANCIS JENKINS. 

